Paper Conference

Proceedings of Building Simulation 2023: 18th Conference of IBPSA


The use of phase change materials in heating buildings: a solar-adaptive passive system

Elence Xinzhu Chen 1,2, Ali Malkawi 1,2
1 Harvard University Graduate School of Design, Cambridge, MA 02138, USA
2 Harvard Center for Green Buildings and Cities, Cambridge, MA 02138, USA

Abstract: This study proposes a Phase Change Materials (PCM) integrated solar-adaptive passive heating system, which provides heating and meets the ventilation requirements through a passive manner, resulting in reduced energy consumption. The thermal behavior of PCM panels with different PCM-encapsulated cell shapes, orientations, cell sizes, and inlet air velocity was comprehensively investigated. Simulation results show that PCM encapsulated in hexagonal cells with horizontal orientation and a radius of 16.5mm provide the best thermal performance by delivering the highest average outlet air temperature and larger enthalpy change over time. By installing the proposed system on a south-facing façade in a 20m2 office space in Boston and mixing the same amount of indoor and outdoor air, the system helps to reduce approximately 20% of energy reduction.
Keywords: Phase Change Materials, Passive System, Thermal Behavior, Energy Reduction
Pages: 3248 - 3255